package com.itheima.mapper;

import com.itheima.pojo.Dept;
import org.apache.ibatis.annotations.*;

import java.util.List;

@Mapper
public interface DeptMapper {
    /**
     * 查询所有部门
     * @return
     */
    //方法一：手动结果映射
//    @Results({
//            @Result(column="create_time",property = "createTime"),
//            @Result(column = "update_time",property = "updateTime")
//    })
    //方式二：起别名
    //@Select("SELECT id,name,create_time createTime,update_time updateTime FROM dept ORDER BY update_time desc;")
    @Select("SELECT id,name,create_time ,update_time  FROM dept ORDER BY update_time desc;")
    List<Dept> findAll();

    /**
     * 根据id删除部门
     * @param id
     */
    @Delete("delete from dept where id=#{id}")
    void deleteId(Integer id);

    /**
     * 添加部门
     * @param dept
     */

@Insert("insert into dept(name,create_time,update_time) values(#{name},#{createTime},#{updateTime})")
    void add(Dept dept);
@Select("select * from dept where id=#{id}")
Dept findById(Integer id);
@Update("update dept set name=#{name},update_time=#{updateTime} where id=#{id}")
    void update(Dept dept);
}
